Which of the following is considered a tertiary prevention activity in community health?

Tertiary prevention activities focus on managing and mitigating the effects of a disease or injury after it has occurred, aiming to improve quality of life and reduce complications. Providing rehabilitation services fits this definition perfectly, as it involves helping individuals recover from the effects of diseases, injuries, or disabilities, enabling them to regain functionality and a better quality of life.

In contrast, teaching healthy nutrition is more aligned with primary prevention, as it aims to prevent diseases before they occur by promoting healthy lifestyle choices. Performing pediculosis checks is primarily a secondary prevention activity focused on early detection and treatment to prevent the spread of lice. Administering immunizations is also a form of primary prevention, targeting the prevention of diseases before individuals are exposed to them. Thus, providing rehabilitation services is distinctively recognized as a tertiary prevention activity within the realm of community health.